高强钢WOL试样应力腐蚀开裂的金相跟踪观察  

Metallography Investigation of Hydrogen-induced Stress Corrosion Cracking for High-strength Steels

作　　者：李会录[1] 余竹焕[1] 强军锋[1] 乔利杰[2] 褚武扬[2] 

机构地区：[1]西安科技大学材料系,西安710054 [2]北京科技大学材料物理系,北京100083

出　　处：《腐蚀与防护》2008年第10期587-588,628,共3页Corrosion & Protection

基　　金：国家重点基础研究规划项目(G1998061500)资助

摘　　要：高强钢WOL恒位移试样应力腐蚀的金相跟踪观察表明:高强钢的应力腐蚀在微裂纹出现之前,先在缺口前端出现滑移线,滑移线的出现是由于氢引起的,位错运动形成滑移台阶。氢促进局部塑性变形,当局部塑性变形发展到临界状态时,缺口前端就出现微裂纹。Metallographical track investigation of stress corrosion cracking of high-strength steels WOL constant displacement specimen indicated that the slip line of stress corrosion cracking of high-strength steels preexistence in notch front-end before the appearance of micro-cracks, hydrogen induced slip line and displacement step was caused by dislocation motion. Hydrogen could accelerate the local plastic deformation and the micro-crack appearance in gap front-end when the local plastic deformation run to critical condition.

关 键 词：滑移线 塑性变形 微裂纹 位错 

分 类 号：TG172.9[金属学及工艺—金属表面处理]